BE · Citizenship by descent

Belgian citizenship by descent

Reaches a parent. Every answer on this page is what Postern’s rulebook returns, word for word, with the law it cites. The free check runs the same rules.

Last verified 25 September 20267 sourcesNot legal advice

BE · PARENTPOSSIBLEThrough a parentAttribution by descent (Art. 8)BE · GRANDPARENTUNLIKELYThrough a grandparentNo grandparent routeBE · GREAT-GRANDPARENTUNLIKELYThrough a great-grandparentNo grandparent route
Routes
Attribution by descent (Art. 8)
Dual citizenship
Kept on every open route
Comes with
EU citizenship: the right to live and work in 27 countries

The stamps assume no one in the line became a citizen of another country before the next person in the line was born. What changes each answer is below.

On this page
  1. 01Who qualifies
  2. 02Dates that matter
  3. 03Mothers’ lines
  4. 04Keeping your citizenship
  5. 05The routes and the law
  6. 06The documents
  7. 07What it takes
  8. 08Where the records live
  9. 09Law changes
  10. 10Other doors
  11. 11Sources

01Who qualifies

Who qualifies, generation by generation

POSSIBLE

Can you claim Belgian citizenship through a parent?

Attribution by descent (Art. 8)

A child born abroad to a Belgian parent who was born in Belgium is Belgian automatically. If your parent was also born abroad, you are Belgian only if they declared for you before you turned 5.

What would settle itWhere your Belgian parent was born, and if abroad, whether they filed the declaration before you were 5.

UNLIKELY

Can you claim Belgian citizenship through a grandparent?

No grandparent route

Belgian nationality does not pass to grandchildren born abroad. The Code’s current declaration routes (Art. 12bis) are based on residence, marriage or parenthood in Belgium, not ancestry.

What would settle itWhether your parent is Belgian, which would make you the child of a Belgian.

UNLIKELY

Can you claim Belgian citizenship through a great-grandparent?

No grandparent route

Belgian nationality does not pass to grandchildren born abroad. The Code’s current declaration routes (Art. 12bis) are based on residence, marriage or parenthood in Belgium, not ancestry.

What would settle itWhether your parent is Belgian, which would make you the child of a Belgian.

02Dates that matter

The dates that matter

  1. 1982

    The Constitutional Court held the five-year rule unconstitutional in so far as it leaves no route for a child whose Belgian parent, born abroad, died within the five years without declaring (the parent in that case was born in Turkey in 1982, naturalised Belgian in 2006, and had the child in Turkey in 2014). Constitutional Court, judgment 51/2026 of 23 April 2026 (ECLI:BE:GHCC:2026:ARR.051)

03Mothers’ lines

How mothers’ lines were treated

Belgium’s rule gives the same answer whether the line runs through a mother or a father.

04Keeping your citizenship

Dual citizenship with your home country

You keep your citizenship.

On every open route, the rule lets a citizen of the United States, Canada, the United Kingdom, Australia, New Zealand, Brazil, Argentina or South Africa keep that citizenship.

05The routes

Every route, and the law behind it

Attribution by descent (Art. 8)

Open through a parent

  • POSSIBLE
    Through a parent

The law

What would settle an unsure case

  • Where your Belgian parent was born, and if abroad, whether they filed the declaration before you were 5.

No grandparent route

Closed: no open answer on this route

  • UNLIKELY
    Through a grandparent

    Belgian nationality does not pass to grandchildren born abroad. The Code’s current declaration routes (Art. 12bis) are based on residence, marriage or parenthood in Belgium, not ancestry.

The law

What would settle an unsure case

  • Whether your parent is Belgian, which would make you the child of a Belgian.

06The documents

The documents, as the rule lists them

Attribution by descent (Art. 8)

Through a parent

  • Your parent’s Belgian birth certificate or nationality certificate
  • Your birth certificate
  • The declaration record, if your parent was born abroad

Most countries also want proof that no one in the line became a citizen elsewhere before the next birth: the naturalization record with its date, or a letter that none exists.

07What it takes

What it takes: time, cost, the hard part, who decides

Attribution by descent (Art. 8)

Time
3–12 months once the documents are in: a declaration adds several months of prosecutor review beyond simple registration.
Cost
About $250–450 for straightforward attribution, but declaration-based cases (including this entry's grandchild-born-abroad scenario) now carry a much higher government fee: Belgium raised it from €150 to €1,000 (indexed to ~€1,030 for 2026) as of 29 July 2025.
The hard part
Proving where your Belgian parent was born. If they were also born abroad, finding the declaration your grandparent filed for them before their fifth birthday, or filing it now for you if they never did.
Who decides
The Belgian consulate for your address, which forwards the registration to the commune.
The first record
Your parent’s Belgian birth certificate or nationality certificate, from The commune (gemeente/commune) where they were born, or the Belgian civil registry. Write to the commune’s civil status office (état civil) with the name and date of birth; most answer by post or email in 2–6 weeks. canada.diplomatie.belgium.be

How it’s filed

Where
The Belgian Embassy in Washington or the Consulate General in Atlanta, Los Angeles or New York, by jurisdiction of residence (Texas and Oklahoma moved to Atlanta on 1 September 2026) office list
How
By post; no appearance needed
Fee
About $420
Decision
2–12 months
What goes in the file (7)
  1. Nationality enquiry form, completed, signed and dated
  2. Member's long-form birth certificate (city of birth and both parents), apostilled, with certified translation, under six months old
  3. Belgian parent's Belgian birth certificate or certificate of Belgian nationality
  4. Parents' marriage certificate, apostilled and translated
  5. If the parent was born abroad: the declaration attributing Belgian nationality made before the member's fifth birthday
  6. For members over 28 born after 1966: Belgian passport or ID issued between 18 and 28, or the declaration of retention
  7. Photo ID and proof of residence in the consular district (driver's license, lease or recent bill)
What goes wrong (6)
  • Fee: the U.S. posts' list (from 1 October 2026) charges $420 for nationality research, $60 for a nationality declaration act, $90 for an adult passport. Whether the research fee applies when the parent's nationality is on record is unverified.
  • Canada's Montreal post takes enquiries by email or post with no appointment and quotes up to 12 months. U.S. posts' own enquiry procedure was not published on the pages checked; confirm with the post before sending.
  • If the Belgian parent was born abroad and did not declare before the member turned 5, the member is not Belgian by Art. 8 (U.S. posts' guidance); no adult-age remedy was verified this pass.
  • Takes reports Belgium raised the nationality-declaration fee from €150 to €1,000 on 29 July 2025. That appears to concern acquisition declarations (e.g. Art. 12bis), not Art. 8 attribution; unverified.
  • From CA: the Consulate General in Montreal handles enquiries (email or post). From GB, AU, NZ, BR, AR, ZA: the Belgian embassy or consulate for that country.
  • Street addresses (2026-09-25 search snippets, official domain not independently fetched): Embassy Washington, 1430 K Street NW, Washington, DC (suite/zip not found); Consulate General Atlanta, 230 Peachtree Street NW, Suite 2250, Atlanta, GA 30303; Consulate General Los Angeles, 6300 Wilshire Boulevard, Suite 720, Los Angeles, CA 90048; Consulate General New York, One Dag Hammarskjöld Plaza, 885 East 47th Street, 41st floor, New York, NY 10018. Full state-by-state jurisdiction beyond the TX/OK move to Atlanta is unconfirmed, so these are not broken out into per-post regions.

Checked 25 September 2026 · source ↗

Estimates are honest ranges from official fee tables and what families report; where a fee or time could not be confirmed, it says so.

08Where the records live

Where each record lives, and how to ask for it

  • birth

    The commune (gemeente) of birth, état civil / burgerlijke stand. Acts drawn up since 31 March 2019 sit in the central civil-status database (BAEC/DABS) and any commune can issue them.

    The Belgian parent's commune of birth. Language of the record follows the commune: French, Dutch or German.

    Ask
    By email, in French
    Takes
    2–9 weeks
    Good to know (2)
    • Write in the commune's language (Dutch in Flanders, French in Wallonia, either in Brussels). Most answer by post or email in 2–6 weeks (takes); fee varies by commune, unverified.
    • The BAEC detail (central database since 31 March 2019) was not re-verified this pass.

    Checked 25 September 2026 · source ↗

  • citizenship

    Proof the Belgian line kept its nationality: the parent's Belgian passport or eID, a certificate of Belgian nationality from their commune or consular register, and, for a member born abroad after 1966 and now over 28, a Belgian passport/ID issued between 18 and 28 or a declaration of retention.

    Ask
    By email, in French
    Takes
    2–13 weeks
    Good to know (1)
    • Automatic loss at 28 applies to those born abroad after 1 January 1967 with no main residence in Belgium from 18 to 28, no declaration of retention and another nationality; a passport or ID issued 18–28 saved it for anyone under 28 on 12 July 2018.

    Checked 25 September 2026 · source ↗

Translations

Into
French, Dutch or German (the language of the commune where the act will be transcribed)
Who may translate
Any certified translator; the translation itself is legalized
About
$30–$90 a page

U.S. documents need an apostille and a sworn or certified translation into the commune's language, the act and translation not older than six months. A U.S. translator's translation must be notarized and apostilled; a Belgian sworn translator's (Federal Justice register) needs no apostille. Per-page price unverified.

Checked 25 September 2026 · source ↗

The passport

Where
The same Belgian post, in person, after consular registration (flying-consul missions add a $60 surcharge from 1 October 2026)
Fee
About $90
Time
2–9 weeks

Checked 25 September 2026 · source ↗

09Law changes

Recent and pending changes

The legislative watch has no pending bill or recent ruling recorded for Belgium.

The watch re-reads the official pages behind this guide every day. When one changes, a person re-checks the rule before anything here moves.

10Other doors

If descent doesn’t reach you

2 residence programs lead to Belgium without an ancestor, each with its own law and road to citizenship.

11Sources

Every source on this page

3 laws and official pages behind the answers, then the offices and pages behind the records and filing. Records and filing checked 25 September 2026.

  1. LawCode of Belgian Nationality, Art. 8 (attribution by descent; declaration before age 5 for children born abroad to a parent also born abroad) · Art. 8 §1; Art. 8; Art. 12bis
  2. LawConstitutional Court, judgment 51/2026 of 23 April 2026 (ECLI:BE:GHCC:2026:ARR.051)
  3. LawBelgian consular service: loss at 28 (Code of Belgian Nationality, Art. 22 §1 5°)
  4. RecordsThe commune (gemeente/commune) where they were born, or the Belgian civil registry: Your parent’s Belgian birth certificate or nationality certificate · checked 25 September 2026
  5. RecordsHow to file: Attribution by descent (Art. 8) · checked 25 September 2026
  6. RecordsBelgian nationality enquiry form plus consular registration form (Canada's published enquiry form; U.S. posts issue theirs on contact) · checked 25 September 2026
  7. RecordsCitizenship records: Proof the Belgian line kept its nationality · checked 25 September 2026

Not legal advice. Postern’s rulebook is written from the statutes and tested against documented cases; where the law is unsettled, the answer says “possible” or “unsure” rather than guess.

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